Revert "serial: Mark the API stable"

This reverts commit e2029732.

Reason for revert: WebViewLayoutTest#testWebViewIncludedStableInterfaces is failing because the new API doesn't set up whether it should be exposed in WebView. Interfaces which are intentionally not exposed in WebView need to be added to not-webview-exposed.txt

Original change's description:
> serial: Mark the API stable
>
> Updates runtime_enabled_features.json5 and the stable webexposed tests
> to mark the Web Serial API stable on desktop platforms.
>
> Intent to Ship: https://groups.google.com/a/chromium.org/g/blink-dev/c/RCtZPCQLLOQ
>
> Bug: 884928
> Change-Id: Ifefaa045a239d3b482287016c98e72c0d8c1da15
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2579840
> Commit-Queue: Reilly Grant <reillyg@chromium.org>
> Auto-Submit: Reilly Grant <reillyg@chromium.org>
> Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#840355}

TBR=reillyg@chromium.org,chrishtr@chromium.org,chromium-scoped@luci-project-accounts.iam.gserviceaccount.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 884928, 1163922
Change-Id: Ib6cc7c3e2d5c323abf4d135da576a87d178653ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2611260Reviewed-by: Alex Ilin <alexilin@chromium.org>
Reviewed-by: Alice Wang <aliceywang@chromium.org>
Auto-Submit: Alex Ilin <alexilin@chromium.org>
Commit-Queue: Alex Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#841158}

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1831,7 +1831,8 @@
     },
     {
       name: "Serial",
-      status: {"Android": "", "default": "stable"},
+      origin_trial_feature_name: "Serial",
+      status: {"Android": "", "default": "experimental"},
     },
     {
       name: "ServiceWorkerClientLifecycleState",

third_party/blink/web_tests/virtual/stable/fast/dom/Window/property-access-on-cached-properties-after-frame-navigated-expected.txt

@@ -40,8 +40,6 @@ PASS window.cached_navigator_mediaSession.metadata is null
 PASS window.cached_navigator_mediaSession.playbackState is 'none'
 PASS window.cached_navigator_presentation.defaultRequest is null
 PASS window.cached_navigator_presentation.receiver is null
-PASS window.cached_navigator_serial.onconnect is null
-PASS window.cached_navigator_serial.ondisconnect is null
 PASS window.cached_navigator_serviceWorker.controller is null
 PASS window.cached_navigator_serviceWorker.oncontrollerchange is null
 PASS window.cached_navigator_serviceWorker.onmessage is null

third_party/blink/web_tests/virtual/stable/fast/dom/Window/property-access-on-cached-properties-after-frame-removed-and-gced-expected.txt

@@ -40,8 +40,6 @@ PASS window.cached_navigator_mediaSession.metadata is null
 PASS window.cached_navigator_mediaSession.playbackState is 'none'
 PASS window.cached_navigator_presentation.defaultRequest is null
 PASS window.cached_navigator_presentation.receiver is null
-PASS window.cached_navigator_serial.onconnect is null
-PASS window.cached_navigator_serial.ondisconnect is null
 PASS window.cached_navigator_serviceWorker.controller is null
 PASS window.cached_navigator_serviceWorker.oncontrollerchange is null
 PASS window.cached_navigator_serviceWorker.onmessage is null

third_party/blink/web_tests/virtual/stable/fast/dom/Window/property-access-on-cached-properties-after-frame-removed-expected.txt

@@ -40,8 +40,6 @@ PASS window.cached_navigator_mediaSession.metadata is null
 PASS window.cached_navigator_mediaSession.playbackState is 'none'
 PASS window.cached_navigator_presentation.defaultRequest is null
 PASS window.cached_navigator_presentation.receiver is null
-PASS window.cached_navigator_serial.onconnect is null
-PASS window.cached_navigator_serial.ondisconnect is null
 PASS window.cached_navigator_serviceWorker.controller is null
 PASS window.cached_navigator_serviceWorker.oncontrollerchange is null
 PASS window.cached_navigator_serviceWorker.onmessage is null

third_party/blink/web_tests/virtual/stable/fast/dom/Window/property-access-on-cached-window-after-frame-navigated-expected.txt

@@ -46,8 +46,6 @@ PASS oldChildWindow.navigator.presentation.defaultRequest is newChildWindow.navi
 PASS oldChildWindow.navigator.presentation.receiver is newChildWindow.navigator.presentation.receiver
 PASS oldChildWindow.navigator.product is newChildWindow.navigator.product
 PASS oldChildWindow.navigator.productSub is newChildWindow.navigator.productSub
-PASS oldChildWindow.navigator.serial.onconnect is newChildWindow.navigator.serial.onconnect
-PASS oldChildWindow.navigator.serial.ondisconnect is newChildWindow.navigator.serial.ondisconnect
 PASS oldChildWindow.navigator.serviceWorker.controller is newChildWindow.navigator.serviceWorker.controller
 PASS oldChildWindow.navigator.serviceWorker.oncontrollerchange is newChildWindow.navigator.serviceWorker.oncontrollerchange
 PASS oldChildWindow.navigator.serviceWorker.onmessage is newChildWindow.navigator.serviceWorker.onmessage

third_party/blink/web_tests/virtual/stable/webexposed/feature-policy-features-expected.txt

@@ -34,7 +34,6 @@ payment
 picture-in-picture
 publickey-credentials-get
 screen-wake-lock
-serial
 sync-xhr
 usb
 xr-spatial-tracking

third_party/blink/web_tests/virtual/stable/webexposed/global-interface-listing-dedicated-worker-expected.txt

@@ -1116,28 +1116,6 @@ Starting worker: resources/global-interface-listing-worker.js
 [Worker]     getter statusCode
 [Worker]     getter violatedDirective
 [Worker]     method constructor
-[Worker] interface Serial : EventTarget
-[Worker]     attribute @@toStringTag
-[Worker]     getter onconnect
-[Worker]     getter ondisconnect
-[Worker]     method constructor
-[Worker]     method getPorts
-[Worker]     setter onconnect
-[Worker]     setter ondisconnect
-[Worker] interface SerialPort : EventTarget
-[Worker]     attribute @@toStringTag
-[Worker]     getter onconnect
-[Worker]     getter ondisconnect
-[Worker]     getter readable
-[Worker]     getter writable
-[Worker]     method close
-[Worker]     method constructor
-[Worker]     method getInfo
-[Worker]     method getSignals
-[Worker]     method open
-[Worker]     method setSignals
-[Worker]     setter onconnect
-[Worker]     setter ondisconnect
 [Worker] interface ServiceWorkerRegistration : EventTarget
 [Worker]     attribute @@toStringTag
 [Worker]     getter active
@@ -2767,7 +2745,6 @@ Starting worker: resources/global-interface-listing-worker.js
 [Worker]     getter permissions
 [Worker]     getter platform
 [Worker]     getter product
-[Worker]     getter serial
 [Worker]     getter storage
 [Worker]     getter usb
 [Worker]     getter userAgent

third_party/blink/web_tests/virtual/stable/webexposed/global-interface-listing-expected.txt

@@ -4564,7 +4564,6 @@ interface Navigator
     getter product
     getter productSub
     getter scheduling
-    getter serial
     getter serviceWorker
     getter storage
     getter usb
@@ -6965,29 +6964,6 @@ interface SensorErrorEvent : Event
     attribute @@toStringTag
     getter error
     method constructor
-interface Serial : EventTarget
-    attribute @@toStringTag
-    getter onconnect
-    getter ondisconnect
-    method constructor
-    method getPorts
-    method requestPort
-    setter onconnect
-    setter ondisconnect
-interface SerialPort : EventTarget
-    attribute @@toStringTag
-    getter onconnect
-    getter ondisconnect
-    getter readable
-    getter writable
-    method close
-    method constructor
-    method getInfo
-    method getSignals
-    method open
-    method setSignals
-    setter onconnect
-    setter ondisconnect
 interface ServiceWorker : EventTarget
     attribute @@toStringTag
     getter onerror